146 



ESSAY ON CLASSIFICATION. 



during each period ; not to speak of the causes of these 

 changes, or even the circumstances under which they 

 have taken place. 



my statement, such, for instance, 

 as my name left standing as autho- 

 rity for the species of Mespilia, Le- 

 nita, Gualteria, and Breynia, while 

 the genera bear his, I need not al- 

 lude further to the subject. This is 

 one of the most extraordinary cases 

 of plagiarism I know of. DESOR (E.), 

 Synopsis desEchinides fossiles ; Paris, 

 1854-56, 8vo. fig. ; partly reprinted 

 from my Catalogue, with additions 

 and figures. BUCH (L. v.), Ueber 

 die Cystideen ; Berlin, 1844, 4to. fig. ; 

 Ak. d. Wiss. MULLER (J.), Ueber 

 den Bau der Echinodermen ; Berlin, 

 1854, 4to. fig. ROEMER (F.), Ueber 

 Stephauocrinus, etc., Wiegm. Arch., 

 1850, p. 365. Monographic der fos- 

 silen Crinoidenfamilie der Blastoi- 

 deen, etc., Wiegm. Arch., 1851, p. 

 323. FORBES (ED.), Echinodermata 

 of the British Tertiaries (Palaeont. 

 Soc.), 1852, 4to. fig. Mem. of the 

 Geol. Surv. of the Unit. Kingdom ; 

 London, 1849, 8vo. fig., Dec. 1st, 3d, 

 and 4th. Mollusks : DBS HAYES (G. 

 P.), Traite elementaire de Conchyli- 

 ologie, etc. ; Paris, 1835-39, 2 vols. 

 8vo. fig. Description des coquilles 

 caracteristiques des terrains ; Paris, 

 1831, 8vo. fig. WOODWARD (S. P.), 

 A Manual of the Mollusca, etc. ; 

 London, 1851-54, 12mo. fig. HAGE- 

 NOW (FR. v.), Die Bryozoen der Maas- 

 trichterKreideformation,Cassel,1851, 

 4to. fig. DES MOULINS (C.), Essai 

 sur les Spherulites, Bull. Soc. Lin. ; 

 Bordeaux, 1827. ROQUAN (0. R. DU), 

 Description des Coquilles fossilles de 

 la famille des Rudistes, etc., Carcas- 

 sonne, 1841, 4tO. fig. HOENINGHAUS 

 (FR. W.), Monographic der Gattung 

 Crania, Diisseldorf, 1828, 4to. fig. 

 BUCH (L. v.), Ueber Terebrateln, etc. ; 

 Berlin, 1834, 4to. fig. ; Ak.d. Wiss. Ue- 

 ber Productus und Leptsena ; Berlin, 

 1842, 4to. fig. ; Ak. d. Wiss. DAVID- 

 SON (Tn.), British Brachiopoda (Pa- 

 loeont. Soc.) : London, 1851-55, 4to. 



fig. DE KONINCK (L.), Recherches 

 sur les auimaux fossiles ; Lieges, 

 1847, 4to. fig. AGASSIZ (L.), Etudes 

 crit. q. a., p. 80. FAVRE (A.), Obser- 

 vations sur les Diceratos ; Geneve, 

 1843, 4to. fig. -BELLARDI (L.), e Mi- 

 CHELLOTTI (G.), Saggio orittografico 

 sulla classe dei Gasteropodi fossili, 

 Torino, 1840, 4to.fig.DE HAAN(W.), 

 Monographic Ammoniteorum et 

 Goniatiteorum Specimen ; Lugduni- 

 Batav., 1825, 8vo. BUCH (L. v.), 

 Ueber Ammoniten, iiber ihre Sonder- 

 ung in Familien, etc. ; Berlin, 1832, 

 4to. fig. Ak. d. Wiss. Ueber Gonio- 

 titen und Clymenien in Schlesien ; 

 Berlin, 1839, 4to. fig. ; Ak. d. Wiss. 

 MUNSTER (GR. v.), Ueber Goniati- 

 ten und Planuliten im Uebergangs- 

 kalk, etc. : Baireuth, 1832, 4to. fig. 

 VOLTZ (Pn. L.), Observations sur les 

 Beleranites ; Paris, 1830, 4to. fig. 

 QUENSTEDT (F. A.), De Notis Nau- 

 tileorum priniariis, etc. ; Berolini, 

 1834. 8vo. Crustacea : BRONGNIART 

 (AL.), et DESMAREST (A. G.), Histoire 

 naturelle des Trilobites, etc. ; Paris, 

 1822, 4to. fig. DALMAN (J. W.), 

 Ueber die Palacaden oder die soge- 

 nannten Trilobiten, a. d. Schwed. ; 

 Niirnberg, 1828, 4to .fig. GREEN ( J.), 

 A Monograph of the Trilobites of 

 North America, etc. ; Philadelphia, 

 1833, 8vo. fig. EMMERICH (H. F.), 

 De Trilobitis ; Berolini, 1839, 8vo. 

 fig. Zur Naturgeschichte der Tri- 

 lobiten ; Meiningen, 1844, 4to. 

 BURMEISTER (H.), Die Organisa- 

 tion der Trilobiten ; Berlin, 1843, 

 4to. fig. ; (Ray Society.) BEYRICH 

 (E.), Ueber einige bShmische Trilo- 

 biten ; Berlin, 1845, 4to. ; 2d part, 

 1846, 4to. CORDA (A. J. C.), und 

 HAWLE (!G.), Prodrom einer Mono- 

 graphic der bohmischen Trilobiten ; 

 Prag, 1848, 8vo. fig. BARRANDE (J.), 

 Syst. Sil., q. a., p. 32. SALTER (J. 

 W.), In Mem. Geol. Surv., etc., Dec. 2. 

 MONSTER (GR. G. v.), Beitrage zur 



